28988547

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 19274493

約数列:

[1, 3, 7, 19, 21, 49, 57, 97, 107, 133, 147, 291, 321, 399, 679, 749, 931, 1843, 2033, 2037, 2247, 2793, 4753, 5243, 5529, 6099, 10379, 12901, 14231, 14259, 15729, 31137, 38703, 42693, 72653, 90307, 99617, 197201, 217959, 270921, 298851, 508571, 591603, 1380407, 1525713, 4141221, 9662849, 28988547]

約数ペア:

[(1, 28988547), (3, 9662849), (7, 4141221), (19, 1525713), (21, 1380407), (49, 591603), (57, 508571), (97, 298851), (107, 270921), (133, 217959), (147, 197201), (291, 99617), (321, 90307), (399, 72653), (679, 42693), (749, 38703), (931, 31137), (1843, 15729), (2033, 14259), (2037, 14231), (2247, 12901), (2793, 10379), (4753, 6099), (5243, 5529)]